ii) A strange computer behavior we've seen is that the Excel "Data Analysis" simply disappears from the "Tools" menu. If this happens, go to step 1 and start again. At step 3, uninstall (uncheck) the Analysis Tool Pak. Click "OK" .
Then follow steps 1-5, to install "Analysis Tool Pak" and "Analysis Tool Pak-VBA" again.
The menu item will reappear.
a. Select "Tools" in the Menu bar
b. Choose "Data Analysis"
Thanks to the University of Minnesota.